Exergy efficiency investigation and optimization of an Al2O3–water nanofluid based Flat-plate solar collector

Shojaeizadeh, Ehsan; Veysi, Farzad; Kamandi, Ahmad

doi:10.1016/j.enbuild.2015.04.048

Cited by 106 publications

(34 citation statements)

References 34 publications

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“…In this study, a mixture of water and Fe3O4 nanoparticles compounds the ferrofluid, with the different volumetric fractions, with a general volume fraction range of 0.1-4% [39]. The nanoparticles are spherical with a diameter of about 10 nm.…”

Section: Ferrofluid Thermo-physical Propertiesmentioning

confidence: 99%

The influence of magnetic field on heat transfer of magnetic nanofluid in a double pipe heat exchanger proposed in a small-scale CAES system

Malekan

Khosravi

Zhao

2019

Applied Thermal Engineering

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Globally, the integration of renewable energy (which has an intermittent nature) into the power system requires the system operators to improve the system performance to be able to effectively handle the variations of the power production in order to balance the supply and demand. This problem is seen as a major obstacle to the expansion of renewable energy if it is not handled in a suitable way. Efficient electricity storage technology is one of the feasible solutions. The current study proposes Fe3O4/water nanofluid under magnetic field as the secondary fluid in the proposed double pipe heat exchanger before the cavern. The heat of compressed air is absorbed by the secondary fluid and it is stored in an isolation tank. This stored fluid is used to warm up the air that leaves the cavern for expanding in the turbine. The results demonstrated that increasing the mass flow rate of secondary fluid decreases the cavern temperature. Also, the value of convective heat transfer of ferrofluid increases when the volume fraction of nanoparticle as well as magnetic field increases. Furthermore, increasing the volume fraction and magnetic field increases the pressure drop and friction factor of ferrofluid.

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Section: Ferrofluid Thermo-physical Propertiesmentioning

confidence: 99%

The influence of magnetic field on heat transfer of magnetic nanofluid in a double pipe heat exchanger proposed in a small-scale CAES system

Malekan

Khosravi

Zhao

2019

Applied Thermal Engineering

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“…The optimization of solar efficiency was studied on flat plat type collectors using Al 2 O 3 /water and pure water. The low fluid outlet temperature exhibits on direct absorption type of solar collectors and investigated thermo-physical properties of nanofluid [22,23]. Through this literature finding, the aim of the present research was design and development of parabolic solar trough collector using rGO/water as nanofluid with pure water.…”

Section: Introductionmentioning

confidence: 96%

Thermal Performance on Parabolic Solar trough Collector by using Rgo/Water Nanofluid

Gowda*,

Dassappa

2020

IJRTE

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The solar water heating systems are one of the popular devices to harness the sun radiation incident on the surface of earth at free of cost. The ASHARE standards 93-86 were followed to study the thermal performance of parabolic solar trough collector using rGO/water nanofluid with the mass fraction of 1% used as a working coolant. To enhance the efficiency regarding temperatures variations, flow rate, and incident solar radiations was examined. These results show that influencing of nanofluid on the collector had more efficient than with pure water owing to solar radiation and flow rate. The efficiency of solar parabolic trough collector has improved with an effect of nanofluid compared to pure water.

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“…Authors suggest that more potential research is still awaited to get the long-term stability for incredible performance enhancement.Said et al [11] has experimentally investigated the energy and exergy analysis by using Al 2 O 3 nanofluid having different size of nanoparticles diameter, the two different sizes 13 nm and 20 nm of Al 2 O 3 nanoparticles were used and found that thermal conductivity enhancement and efficiency was highest for 13 nm Al 2 O 3 nanoparticle, compared to that of 20 nm Al 2 O 3 nanoparticle. Shojaeizadehet al [12]did investigation on Al 2 O 3 /Water nanofluid for improving the performance of collector and solar radiation, result reveals 0.72% exergy efficiency. Sharafeldinet al [13] had carried out the researchwith dispersing the cerium oxide nanoparticles in base fluid like water experimentally.…”

Section: Introductionmentioning

confidence: 97%

Particle Optimization of Ceo2/Water Nanofluids in Flat Plate Solar Collector

Sharma,

Tiwari,

Tiwari

et al. 2019

IJEAT

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The present research focuses on the role of CeO 2 /water nanofluid for estimating the performance of flat plate solar collector in respect of energetic and exergetic performance. Based on our experimental findings on varying mass flow rate, the present analysis focuses on a wide range of concentrations to find optimum volume concentration for which thermal performance is maximum. CeO 2 /water nanofluid exhibits high thermal conductivity improvement (~41.7%at 1.5% volume concentration) and comparatively lower dynamic viscosity. Performance evaluation of flat plate collector is based on first law analysis and qualitative nature of energy flow based on second law analysis. Experiments indicate that for~1.0% particle volume concentration at a mass flow rate of 0.03 kg/s, maximum collector efficiency is obtained up to 57.1% instead of water as the base fluid. Exergetic efficiency observed 84.6%at optimum concentration (~1.0% particle volume) of nanofluid at0.01 kg/s flow rate.

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Exergy efficiency investigation and optimization of an Al2O3–water nanofluid based Flat-plate solar collector

Cited by 106 publications

References 34 publications

The influence of magnetic field on heat transfer of magnetic nanofluid in a double pipe heat exchanger proposed in a small-scale CAES system

The influence of magnetic field on heat transfer of magnetic nanofluid in a double pipe heat exchanger proposed in a small-scale CAES system

Thermal Performance on Parabolic Solar trough Collector by using Rgo/Water Nanofluid

Particle Optimization of Ceo2/Water Nanofluids in Flat Plate Solar Collector

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